Back in April, we launched our mobile image ads based on the recommended guidelines of the Mobile Marketing Association (MMA). At about the same time, the MMA published its new mobile advertising guidelines. The new guidelines set forth suggested sizes for image ads that were different from its previous guidelines, so our image ad sizes were not in line with the new recommendations.

We're delighted to announce that our mobile image ads are now MMA-compliant. Google mobile image ads now come in six sizes -- three sizes for each of two different aspect ratios: 6x1 and 4x1. We've also increased our file size allowances so you can do even more with your advertising creatives. Watch the video below to see a comparison of the old and new image ad sizes.

We think that working with industry standards like those proposed by the MMA will help us create the best experience for our advertisers and users. We will continue to work with the MMA to ensure consistency between our formats and future guidelines.

And don't worry, if you have an ad in an old format that's already uploaded to your account, it will continue to run. From here on out, though, we'll be accepting uploads only in the MMA-compliant formats. To take a look at our new offering, refer to our mobile image ads example page. You can also get a refresher on our mobile image ads policies.